Agaricus arvensis “Horse Mushroom"
It grows in fields, grass and at the edge of gardens and woods. A potential lookalike is the deadly Amanita bisporigera (also known as Amanita virosa). However, the amanita has a sac-liike cup at its base, lacks the ainse fragrance of Agaricus arvensis, and produces a white, rather than the brown spore print of Agaricus species. Saprotrophic. Edible.